BUGFIX: fix dead_lock between advance_checkpoint_by_flush and create_ls

src/storage/backup/ob_backup_task.cpp

@@ -72,13 +72,9 @@ static int advance_checkpoint_by_flush(const uint64_t tenant_id, const share::Ob
   int ret = OB_SUCCESS;
   const int64_t advance_checkpoint_timeout = GCONF._advance_checkpoint_timeout;
   LOG_INFO("backup advance checkpoint timeout", K(tenant_id), K(advance_checkpoint_timeout));
-  checkpoint::ObCheckpointExecutor *checkpoint_executor = NULL;
   if (start_scn < 0) {
     ret = OB_INVALID_ARGUMENT;
     LOG_WARN("get invalid args", K(ret), K(start_scn));
-  } else if (OB_ISNULL(checkpoint_executor = ls->get_checkpoint_executor())) {
-    ret = OB_ERR_UNEXPECTED;
-    LOG_WARN("checkpoint executor should not be null", K(ret), KPC(ls));
   } else {
     ObLSMetaPackage ls_meta_package;
     int64_t i = 0;
@@ -88,7 +84,7 @@ static int advance_checkpoint_by_flush(const uint64_t tenant_id, const share::Ob
       if (cur_ts - start_ts > advance_checkpoint_timeout) {
         ret = OB_BACKUP_ADVANCE_CHECKPOINT_TIMEOUT;
         LOG_WARN("backup advance checkpoint by flush timeout", K(ret), K(tenant_id), K(ls_id), K(start_scn));
-      } else if (OB_FAIL(checkpoint_executor->advance_checkpoint_by_flush(start_scn))) {
+      } else if (OB_FAIL(ls->advance_checkpoint_by_flush(start_scn))) {
         if (OB_NO_NEED_UPDATE == ret) {
           // clog checkpoint ts has passed start log ts
           ret = OB_SUCCESS;

src/storage/checkpoint/ob_checkpoint_executor.cpp

@@ -200,48 +200,52 @@ int ObCheckpointExecutor::update_clog_checkpoint()
 
 int ObCheckpointExecutor::advance_checkpoint_by_flush(int64_t recycle_ts) {
   int ret = OB_SUCCESS;
-  int tmp_ret = OB_SUCCESS;
 
-  // calcu recycle_ts according to clog disk situation
-  if (recycle_ts == 0) {
-    LSN end_lsn;
-    int64_t calcu_recycle_ts = INT64_MAX;
-    if (OB_FAIL(loghandler_->get_end_lsn(end_lsn))) {
-      STORAGE_LOG(WARN, "get end lsn failed", K(ret), K(ls_->get_ls_id()));
-    } else {
-      LSN clog_checkpoint_lsn = ls_->get_clog_base_lsn();
-      LSN calcu_recycle_lsn = clog_checkpoint_lsn
-            + ((end_lsn - clog_checkpoint_lsn) * CLOG_GC_PERCENT / 100);
-      if (OB_FAIL(loghandler_->locate_by_lsn_coarsely(calcu_recycle_lsn, recycle_ts))) {
-        STORAGE_LOG(WARN, "locate_by_lsn_coarsely failed", K(calcu_recycle_ts), K(calcu_recycle_lsn),
-                      K(recycle_ts), K(ls_->get_ls_id()));
+  ObSpinLockGuard guard(lock_);
+  if (update_checkpoint_enabled_) {
+    int tmp_ret = OB_SUCCESS;
+
+    // calcu recycle_ts according to clog disk situation
+    if (recycle_ts == 0) {
+      LSN end_lsn;
+      int64_t calcu_recycle_ts = INT64_MAX;
+      if (OB_FAIL(loghandler_->get_end_lsn(end_lsn))) {
+        STORAGE_LOG(WARN, "get end lsn failed", K(ret), K(ls_->get_ls_id()));
       } else {
-        STORAGE_LOG(INFO, "advance checkpoint by flush to avoid clog disk full",
-                    K(recycle_ts), K(end_lsn), K(clog_checkpoint_lsn),
-                    K(calcu_recycle_lsn), K(ls_->get_ls_id()));
+        LSN clog_checkpoint_lsn = ls_->get_clog_base_lsn();
+        LSN calcu_recycle_lsn = clog_checkpoint_lsn
+              + ((end_lsn - clog_checkpoint_lsn) * CLOG_GC_PERCENT / 100);
+        if (OB_FAIL(loghandler_->locate_by_lsn_coarsely(calcu_recycle_lsn, recycle_ts))) {
+          STORAGE_LOG(WARN, "locate_by_lsn_coarsely failed", K(calcu_recycle_ts), K(calcu_recycle_lsn),
+                        K(recycle_ts), K(ls_->get_ls_id()));
+        } else {
+          STORAGE_LOG(INFO, "advance checkpoint by flush to avoid clog disk full",
+                      K(recycle_ts), K(end_lsn), K(clog_checkpoint_lsn),
+                      K(calcu_recycle_lsn), K(ls_->get_ls_id()));
+        }
+      }
+      // the log of end_log_lsn and the log of clog_checkpoint_lsn may be in a block
+      if (recycle_ts < ls_->get_clog_checkpoint_ts()) {
+        recycle_ts = INT64_MAX;
       }
     }
-    // the log of end_log_lsn and the log of clog_checkpoint_lsn may be in a block
-    if (recycle_ts < ls_->get_clog_checkpoint_ts()) {
-      recycle_ts = INT64_MAX;
-    }
-  }
 
-  if (OB_SUCC(ret)) {
-    if (recycle_ts < ls_->get_clog_checkpoint_ts()) {
-      ret = OB_NO_NEED_UPDATE;
-      STORAGE_LOG(WARN, "recycle_ts should not smaller than checkpoint_log_ts",
-                  K(recycle_ts), K(ls_->get_clog_checkpoint_ts()), K(ls_->get_ls_id()));
-    } else {
-      STORAGE_LOG(INFO, "start flush",
-                  K(recycle_ts),
-                  K(ls_->get_clog_checkpoint_ts()),
-                  K(ls_->get_ls_id()));
-      for (int i = 1; i < ObLogBaseType::MAX_LOG_BASE_TYPE; i++) {
-        if (OB_NOT_NULL(handlers_[i])
-            && OB_SUCCESS != (tmp_ret = (handlers_[i]->flush(recycle_ts)))) {
-          STORAGE_LOG(WARN, "handler flush failed", K(recycle_ts), K(tmp_ret),
-                      K(i), K(ls_->get_ls_id()));
+    if (OB_SUCC(ret)) {
+      if (recycle_ts < ls_->get_clog_checkpoint_ts()) {
+        ret = OB_NO_NEED_UPDATE;
+        STORAGE_LOG(WARN, "recycle_ts should not smaller than checkpoint_log_ts",
+                    K(recycle_ts), K(ls_->get_clog_checkpoint_ts()), K(ls_->get_ls_id()));
+      } else {
+        STORAGE_LOG(INFO, "start flush",
+                    K(recycle_ts),
+                    K(ls_->get_clog_checkpoint_ts()),
+                    K(ls_->get_ls_id()));
+        for (int i = 1; i < ObLogBaseType::MAX_LOG_BASE_TYPE; i++) {
+          if (OB_NOT_NULL(handlers_[i])
+              && OB_SUCCESS != (tmp_ret = (handlers_[i]->flush(recycle_ts)))) {
+            STORAGE_LOG(WARN, "handler flush failed", K(recycle_ts), K(tmp_ret),
+                        K(i), K(ls_->get_ls_id()));
+          }
         }
       }
     }

src/storage/high_availability/ob_ls_prepare_migration.cpp

@@ -1037,9 +1037,6 @@ int ObStartPrepareMigrationTask::wait_ls_checkpoint_ts_push_()
     LOG_WARN("failed to get ls saved info", K(ret), KPC(ls), KPC(ctx_));
   } else if (!saved_info.is_empty()) {
     LOG_INFO("saved info is not empty, no need wait ls checkpoint ts push", K(saved_info), KPC(ctx_));
-  } else if (OB_ISNULL(checkpoint_executor = ls->get_checkpoint_executor())) {
-    ret = OB_ERR_UNEXPECTED;
-    LOG_WARN("checkpoint executor should not be NULL", K(ret), KPC(ctx_), KP(checkpoint_executor));
   } else {
     const int64_t wait_checkpoint_push_start_ts = ObTimeUtility::current_time();
     while (OB_SUCC(ret)) {
@@ -1059,7 +1056,7 @@ int ObStartPrepareMigrationTask::wait_ls_checkpoint_ts_push_()
         const int64_t cost_ts = ObTimeUtility::current_time() - wait_checkpoint_push_start_ts;
         LOG_INFO("succeed wait clog checkpoint ts push", "cost", cost_ts, "ls_id", ctx_->arg_.ls_id_);
         break;
-      } else if (OB_FAIL(checkpoint_executor->advance_checkpoint_by_flush(ctx_->log_sync_scn_))) {
+      } else if (OB_FAIL(ls->advance_checkpoint_by_flush(ctx_->log_sync_scn_))) {
         if (OB_NO_NEED_UPDATE == ret) {
           ret = OB_SUCCESS;
         } else {

src/storage/ls/ob_ls.cpp

@@ -1153,6 +1153,14 @@ int ObLS::force_tablet_freeze(const ObTabletID &tablet_id)
   return ret;
 }
 
+int ObLS::advance_checkpoint_by_flush(int64_t recycle_ts)
+{
+  int64_t read_lock = LSLOCKALL;
+  int64_t write_lock = 0;
+  ObLSLockGuard lock_myself(lock_, read_lock, write_lock);
+  return checkpoint_executor_.advance_checkpoint_by_flush(recycle_ts);
+}
+
 int ObLS::get_ls_meta_package_and_tablet_ids(ObLSMetaPackage &meta_package, common::ObIArray<common::ObTabletID> &tablet_ids)
 {
   int ret = OB_SUCCESS;

src/storage/ls/ob_ls.h

@@ -605,6 +605,7 @@ public:
 
   // ObCheckpointExecutor interface:
   DELEGATE_WITH_RET(checkpoint_executor_, get_checkpoint_info, int);
+  int advance_checkpoint_by_flush(int64_t recycle_ts);
 
   // ObDataCheckpoint interface:
   DELEGATE_WITH_RET(data_checkpoint_, get_freezecheckpoint_info, int);

src/storage/tx/ob_tx_retain_ctx_mgr.cpp

@@ -50,10 +50,9 @@ int ObAdvanceLSCkptTask::try_advance_ls_ckpt_ts()
       ret = OB_INVALID_ARGUMENT;
     }
     TRANS_LOG(WARN, "get ls faild", K(ret), K(MTL(ObLSService *)));
-  } else if (ls_handle.get_ls()->get_checkpoint_executor()->advance_checkpoint_by_flush(
-                 target_ckpt_ts_)) {
+  } else if (ls_handle.get_ls()->advance_checkpoint_by_flush(target_ckpt_ts_)) {
     TRANS_LOG(WARN, "advance checkpoint ts failed", K(ret), K(ls_id_), K(target_ckpt_ts_));
-  } 
+  }
 
   if (OB_SUCC(ret)) {
     TRANS_LOG(INFO, "[RetainCtxMgr] advance ls checkpoint ts success", K(ret), K(ls_id_), K(target_ckpt_ts_));

src/storage/tx_storage/ob_checkpoint_service.cpp

@@ -355,10 +355,7 @@ int ObCheckPointService::do_minor_freeze()
     ObLS *ls = nullptr;
     int ls_cnt = 0;
     for (; OB_SUCC(iter->get_next(ls)); ++ls_cnt) {
-      ObCheckpointExecutor *checkpoint_executor = nullptr;
-      if (OB_ISNULL(checkpoint_executor = ls->get_checkpoint_executor())) {
-        STORAGE_LOG(WARN, "checkpoint_executor should not be null", K(ls->get_ls_id()));
-      } else if (OB_SUCCESS != (tmp_ret = (checkpoint_executor->advance_checkpoint_by_flush(INT64_MAX)))) {
+      if (OB_SUCCESS != (tmp_ret = (ls->advance_checkpoint_by_flush(INT64_MAX)))) {
         STORAGE_LOG(WARN, "advance_checkpoint_by_flush failed", K(tmp_ret), K(ls->get_ls_id()));
       }
     }